(Click to enlarge image) Creating column shapes with greenscreen® trellis panels is easy. Our standard column trellis is fabricated from a 48″ wide panel, which gives a 15 ½” diameter column as our basic building element. We can provide mounting clips or brackets for attaching to your structure, and you can choose from our standard radius of up to 14’ in height or select a custom radius or square column shape that we can build for you. For taller installations, the columns can be stacked. The standard column trellis can also be mounted on a fiberglass planter for applications that require self-contained units.